Key Battles: Villarreal v Liverpool

LIVERPOOL face Villarreal in the Europa League semi-final first leg on Thursday night. STARSPORT take a look at the key match-ups that will decide the game.

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Marcelino v Jurgen Klopp - Klopp's fast-paced , high-pressing style is at least partially mirrored by his Spanish counterpart, who likes his strikers pressing in the final third and looks for his team to launch quick direct attacks

The Serbian centre-back is under contract until the summer of 2018 but is eager to secure more regular first-team action either at Dortmund or elsewhere.

Subotic has made just 11 appearances for Thomas Tuchel's side this summer.

He said recently: "I want to play as often as possible. I'm very happy in Dortmund but if it is not possible here, then I should be concerned about that."